Worldcon: online jerkitude

So I'm thinking about my Worldcon panels, and I'd like your input on—well, probably on a couple, but to start, there's "How Not to be a Jerk Online." Specifically, I'm trying to come up with a list of bedrock principles that apply across all online contexts, and I keep getting bogged down in my lawyer tendencies. So what would you say are the fundamental, applies-anywhere minimum requirements of human decency when it comes to online interactions? (I'm not saying I won't apply my lawyer tendencies to your answers, but it'd at least help as a starting point.)

Also, and I'm serious about this, I want you to tell me if you think I've been a jerk online. You can comment anonymously, though those comments are screened in case some passerby takes the opportunity to get unnecessarily vicious. I don't seem to be able to turn off IP tracking on a per-entry basis, but I promise not to use it unless you're commenting with threats or the like.